2. Combine the base ingredients in a bowl. Line your slice tray with baking paper. Tray is approx 19 x 29cm / 7 1/2 x 11 1/2 in. Tip mixture into slice tray. Press firmly with the back of a big spoon till you have a smooth and compact base.

3. Whack it in the oven and bake for 15 minutes.

4. Meanwhile, mix up the topping. I used limes for this recipe. Zest the limes (or lemon) first before juicing.

Combine all the topping ingredients in a bowl.

* get another spoon and lick out any remaining condensed milk out of the can while you are waiting for the base to cook - you know you want to. :)

5. Remove the tray from the oven and allow the biscuit base to cool a little. Pour the passionfruit mixture over the top. Return it to the oven to bake for a further 15 minutes.

6. Let the slice cool in the tin. Cut into portions. Store slice in a sealed container in the fridge. The passionfruit slice is best after a couple of hours in the fridge.

Serve on nanna's best flowery plates, accompany it with a nice pot of tea. Enjoy! Guaranteed to become a firm favourite.